[Primary failure of eruption: combined vision between paediatric dentist and orthodontist].

In their daily practice, orthodontists and pedo- dontists have a common aim which is to ensure a functional establishment of the permanent denture. Due to the increase of eruption defects/failures with no clear obstacles, the doctor may encounter some difficulties to elaborate a diagnosis or even feels helpless when in need to define and put in motion a correct therapeutic strategy. The primary failure of eruption (PFE) is an extensively studied disease that has to be distinguished from an ankylosis during the diagnosis to improve the patient care.